Sparse Electromagnetic Measurement to Recover High Fidelity Information for Wireless Power Transfer-Video

Abstract: Trust in technology is essential for its adoption. We accept what is efficient, fair, safe, and secured, where accurate measurement, detection, and sensing technologies provide the discernment of those values. This webinar will present the research vision of creating ‘Sentinels’ using a Sparse Electromagnetic Measurement to Recover High Fidelity Information. A small number of sensors sample the electromagnetic field to reconstruct the information for the diagnostics and prognostics of electromagnetic energy systems. In this webinar, a particular example of the energy system is wireless power transfer, an emerging technology for charging electric vehicles, which needs to be reasonable and safe to use. First, Faraday coil transfer-power measurement (FC-TPM) will be presented which is to measure transfer-power, which imposes the cost for electrical losses to a transmitter (Tx) and receiver (Rx) based on physical heat dissipation, resulting in fair metering. FC-TPM was demonstrated with six sense coils in hardware accurately within 0.1 percent errors despite an Rx coil misalignment of up to 10 cm using a 1 kW wireless power transfer system. Second, Electromagnetic model-based foreign object detection (EM-FOD) for safe wireless charging will be presented. Hardware demonstrations show that a U.S. nickel coin can be detected using only 7 W level, allowing less risky pre-startup low-power detection regardless of an Rx coil misalignment of up to 10 cm. This webinar will be concluded by introducing a future research path, highlighting the advantages and uniqueness of the solution.